document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=823404>Question 823404</A>: <I><SPAN STYLE=\"word-break: break-all;\"> in a test of effectiveness of garlic for lowering cholesterol, 50 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in theor levels of LDL cholesterol (in mg/dL) have a mean of 4.4 and a standard deviation of 19.4. The best point estimate is 4.4. \r<BR>\n" );
document.write( "\n" );
document.write( "1.) what is the confidence interval estimate of the population mean? \r<BR>\n" );
document.write( "\n" );
document.write( "___ mg/dL < mean< ____ (mg/dL)<BR>\n" );
document.write( "round to 2 demial places\r<BR>\n" );
document.write( "\n" );
document.write( "What does the confidence interval suggest about the effectiveness of the treatment:\r<BR>\n" );
document.write( "\n" );
document.write( "A: The confidence interval limits contain 0., suggesting that the garlic treatment did not affect the LDL cholesterol levels. \r<BR>\n" );
document.write( "\n" );
document.write( "B. The confidence interval limits do not contain 0,suggesting that the garlic treatment did not affect the LDL cholesterol levels. \r<BR>\n" );
document.write( "\n" );
document.write( "C. The confidence interval limits do not contain 0,suggesting that the garlic treatment did affect the LDL cholesterol levels. \r<BR>\n" );
document.write( "\n" );
document.write( "D. The confidence interval limits contain 0., suggesting that the garlic treatment did affect the LDL cholesterol levels.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #495494 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=495494\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> in a test of effectiveness of garlic for lowering cholesterol, 50 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. <BR>\n" );
document.write( "The changes in the levels of LDL cholesterol (in mg/dL) have a mean of 4.4 and a standard deviation of 19.4. The best point estimate is 4.4. <BR>\n" );
document.write( "1.) what is 95% confidence interval estimate of the population mean?<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "x-bar = 4.4<BR>\n" );
document.write( "ME = 1.96 = 5.27<BR>\n" );
document.write( "------ <BR>\n" );
document.write( "4.40-5.27 mg/dL <  mean < 4.40+5.27 (mg/dL)<BR>\n" );
document.write( "-0.87 < u < 9.27<BR>\n" );
document.write( "========================<BR>\n" );
document.write( "Ho: no difference<BR>\n" );
document.write( "Ha: is a difference<BR>\n" );
document.write( "----------------------- <BR>\n" );
document.write( "What does the confidence interval suggest about the effectiveness of the treatment: <BR>\n" );
document.write( "A: The confidence interval limits contain 0., suggesting that the garlic treatment did not affect the LDL cholesterol levels. <BR>\n" );
document.write( "B. The confidence interval limits do not contain 0,suggesting that the garlic treatment did not affect the LDL cholesterol levels. <BR>\n" );
document.write( "C. The confidence interval limits do not contain 0,suggesting that the garlic treatment did affect the LDL cholesterol levels. <BR>\n" );
document.write( "D. The confidence interval limits contain 0., suggesting that the garlic treatment did affect the LDL cholesterol levels.<BR>\n" );
document.write( "===<BR>\n" );
document.write( "Ans: Since 0 is in the CI, we fail to reject Ho.<BR>\n" );
document.write( "Ans: A<BR>\n" );
document.write( "=============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );